Can 15 minus 20 be done?

How do you change 0.7 percent to a fraction? 152-foot piece of rope is to be cut into four pieces each successive piece is to be 2 feet longer than the previous one.fine the length of the shortest piece.? How do you write twelve thousands? What are the 7 twin primes less than 80? The perimeter of a sectors of a circle of radius 5.2 cm is 16.4 cm Find the area of the sector? How do you write 2.13 billion dollars? One third of 6 equals? What is 4.5 inches minus 6 inches? What is a 10000 sided shape called in geometry? How can division be expressed as multiplication? Which shape has at least one line of symmetry? What does let he who is without sin cast the first stone mean? When is the exponent negative? How big is a 12 x 12 box? What can you multiply to get 360 with 3 numbers? What is the simplest form for nine twentieth? What is the location of this code 18? What is the surface area of a right prism with base lengths 5 and 12. and height of 14? What is the fractional notation for 8.2? What is a 2D object which has four equal sides?